LT95 tapered roller conversion

[djam1]

Does anyone know if the tapered roller conversion for an LT95 from an Isuzu will fit a v8 or are the gear ratios different??

[Blknight.aus]

the conversion is to do with the guts of the box, If you have an lt95 pushed by a v8 and are happy with the ratios in it then the conversion makes no difference to the ratios.

if you mean swapping an lt85 for a 95 thats a different kettle of fish...

[110county]

Gday

There is only one gear for high range on the intermediate shaft (which is what is replaced in tapered roller conversion). It will be a different ratio (teeth count) to the one in your v8 unless someone has changed the high range gears. Will fit your TC all you will have to do is pull the gear off your existing intermediate shaft and put it on the tapered roller intermediate shaft (easy) and away you go. I have the teeth counts somewhere I can dig them out if you really need them.

Luke

[Blknight.aus]

I might be missing something here....

theres the 1.4:1 gearset and the 1:1 (near enough for the purpose of this discussion) gearset. I thought that both types could be had as taper conversions......

[tony]

As far as i know T/R/B T cases were army spec only for the LT95, all 3 gears on the intermediat shaft in army spec T/cases were tapered roller bearings... stright drop in to civy LT95 T/cases with the correct gearbox sideof the T/case plug...

Tony

[110county]

Mmmm you guys are probably right I thought the gears on standard and tapered roller bearing intermediate shafts would be interchangeable but maybe not.

Luke

[Blknight.aus]

thats what I thought too as we have the 1:1 in the stock rovers and 1.4:1 in the specialists and 6x6..

[djam1]

Thanks guys I wasnt sure if the high ratio gear was machined as part of the process.
If I can use my high ratio gear without machining that answers my question.
I have an LT95 that was built 12 months ago that is a good box but the back lash seems to have increased to an annoying degree.
In the last 12 months i have installed a Detroit locker in the Salisbury and the backlash all seems to have gone a bit too wild.
To be honest I thought it was the Detroit but after reading recent posts saying that a Detroit caused less backlash Im and thinking maybe I have it wrong.
The conversion to tapered rollers may not be the answer but will help the rebuilding process.

[tony]

Am I missing something here ?? if you go the TRB set up you have to use

the gears and shaft... you cant just use the shaft without the

gears..army spec t/C high range is 1.123:1 low range is 3.321:1, there the

same for the 4x4 and the 6x6

or am I on the ignore list of more people than I suspect..:p:p

Tony

[Blknight.aus]

theres 2 different ratios in the army tcases

the normal 4x4s have the 1:1 (near enough) and Rfsv + other specialist type vehicles get the 1.4:1 (near enough). from memory I think low box is about the same. But then when your crawling that slow its hard to do a by the seat of the pants check......

[djam1]

Tony thanks for your reply and you are not on my ignore list
The situation is this I have an LT95 in good condition but the backlash is giving me the ****$. Someone offered me an LT95 TRB conversion tonight but im not sure it is the answer to my problems or do I need to change the gear ratios as the conversion is from an Isuzu
All was well until I installed the Detroit but at the moment I am trying to ascertain what the problem is the Transfer / Rear Tailshaft / or the Detroit.
I cant see the Detroit install being the problem as they are really a Soft locker install that dont change the diff backlash.

Thanks

[tony]

theres 2 different ratios in the army tcases

the normal 4x4s have the 1:1 (near enough) and Rfsv + other specialist type vehicles get the 1.4:1 (near enough). from memory I think low box is about the same. But then when your crawling that slow its hard to do a by the seat of the pants check......


Hi Dave not according to my book (open in front of me) all 4x4 T/C are 1.123:1 high range
3.321.:1 low range
All 6x6 boxs had the same low range as the 4x4 (3.321:1) but there high range was 0.996:1


Tony thanks for your reply and you are not on my ignore list
The situation is this I have an LT95 in good condition but the backlash is giving me the ****$. Someone offered me an LT95 TRB conversion tonight but im not sure it is the answer to my problems or do I need to change the gear ratios as the conversion is from an Isuzu
All was well until I installed the Detroit but at the moment I am trying to ascertain what the problem is the Transfer / Rear Tailshaft / or the Detroit.
I cant see the Detroit install being the problem as they are really a Soft locker install that dont change the diff backlash.

Thanks

Thats good to know....mate the locker wont induce back lash in the T/C

thats one of two things worn shims on the intermidiat shaft or worn shims (spacers) on the gear wheels in the center diff...if you have the opertunity to change to a TRB set do so there much better and when your changing that re-co the center diff..both done without takeing the box out...I used to set that a bit tighter than the book recomended and it was much better
PS for got to say I ran the TRB out of a 4x4 in my 3.5 & 3.9 rangie and it was great
Tony

[Blknight.aus]

[QUOTE=tony;670117]Hi Dave not according to my book (open in front of me) all 4x4 T/C are 1.123:1 high range
3.321.:1 low range
All 6x6 boxs had the same low range as the 4x4 (3.321:1) but there high range was 0.996:1

might want to update that book....

or I might want to get my head off of the lt230....

Ihave the ratios wrong but the vehicle types right.

theres the .996 and the 1.123

substitute those values in my previous posts.

not all mill 4x4 LRs are .996 weve got a dozen on base that arent...Im fairly sure the 6x6's are 1.123:1. But I dont got a 6x6 book in front of me.

I need a holiday....... or a week where nothing goes wrong...

[lokka]

I tought i read somewere that what tony has posted was right as the 6x6 run the .996to1 high range as they still run 4.7 diffs thus needing the .996 in high ..

Also all civi 4bd1's got the same .996 high so they could cope with highway speed ....

And id take a good punt as to say that maby all defence LT95's are of the same raito being .996 to 1 :D:D:D:D

[lokka]

Heres somthing worth a read LandRover Perentie (http://www.allisons.org/ll/4/LandRover/Perentie/)

[Panda]

[quote=tony;670117]Hi Dave not according to my book (open in front of me) all 4x4 T/C are 1.123:1 high range
3.321.:1 low range
All 6x6 boxs had the same low range as the 4x4 (3.321:1) but there high range was 0.996:1

might want to update that book....

or I might want to get my head off of the lt230....

Ihave the ratios wrong but the vehicle types right.

theres the .996 and the 1.123

substitute those values in my previous posts.

not all mill 4x4 LRs are .996 weve got a dozen on base that arent...Im fairly sure the 6x6's are 1.123:1. But I dont got a 6x6 book in front of me.

I need a holiday....... or a week where nothing goes wrong...


Dave all 4x4's should be 123:1 high and 321:1 low, if you have some at work that are not,well you should'nt have as you would know they should all be the same accross the fleet...what level workshop are you?

Tony

[Blknight.aus]

were as deep as it gets, we have the abilityto rebuild if needed but thats under review now that the armys coming to the base.... which sucks because everything we were ment to get to be able to support the bus master looks like its going to be put on hold.

[Panda]

were as deep as it gets, we have the abilityto rebuild if needed but thats under review now that the armys coming to the base.... which sucks because everything we were ment to get to be able to support the bus master looks like its going to be put on hold.


So your classification is a Base workshop?

have you got access to "Mimms" (I suspect SDSS is no longer working)

Tony

[Davo]

If you're worried about the intermediate gears, take the bottom cover off and have a look. It's easy enough to do and when you drain the oil you'll be able to check for any bits. If all's well then at least you'll know it's not the cause of any backlash.

[Panda]

If you're worried about the intermediate gears, take the bottom cover off and have a look. It's easy enough to do and when you drain the oil you'll be able to check for any bits. If all's well then at least you'll know it's not the cause of any backlash.


Davo, its not that easy, there shimed with phrospas bronz shims so un less you can slide the gears on the shaft (and its gotta be very bad to do that) you may not pick it up,and when the shims wear it comes out with the oil as a gold'ie fleck in the oil no bits..

Tony

[Davo]

Naw, if the shims are that bad then there will be an awful lot of bronze in the oil - I mean a lot more than usual - and the gears can be levered over to one side and checked with feeler gauges. I don't have the manual here, (I'm at work! :D), but I think they're set up to something like a few thou and if, say, you found .020" then you'd know there was trouble.

By the way, I forgot to add before that somewhere on this site, (I'm pretty sure it's this site), there's a scan of a picture from the taper roller conversion manual. It shows the shaft, gears, and bearings in a cutaway view drawing.

[Blknight.aus]

So your classification is a Base workshop?

have you got access to "Mimms" (I suspect SDSS is no longer working)

Tony

yep got mims.

Ive printed off copies of the relevent RPS's (just the bulk item of the lt95) and the EMEIs (vehicle G 100 for the stock rover and Vehicle G 130 for the RFSV)

the stock 4x4 has high @.996:1 and low 3.664:1
the RFSV has high @1.123:1 and low 3.664:1

the primary gear ratios stay the same

and funnily enough the NSNs change between the 2 different units. And before you think about saying "yep cause the RFSV has a winch" I used a w/winch RPS for the stock rover.

[Panda]

yep got mims.

Ive printed off copies of the relevent RPS's (just the bulk item of the lt95) and the EMEIs (vehicle G 100 for the stock rover and Vehicle G 130 for the RFSV)

the stock 4x4 has high @.996:1 and low 3.664:1
the RFSV has high @1.123:1 and low 3.664:1

the primary gear ratios stay the same

and funnily enough the NSNs change between the 2 different units. And before you think about saying "yep cause the RFSV has a winch" I used a w/winch RPS for the stock rover.

PM sent
Tar Tony